TWI779667B - Touch display device and electronic device - Google Patents

Abstract

A touch display device is provided in some embodiments of the present disclosure, including a cover plate, a touch sensing film and a display module. The touch sensing film is disposed on the cover plate, including a first surface and a second surface opposite to the first surface. The touch sensing film bends from outside to inside, thereby overlapping the first surface or the second surface, and an overlapping region and a non-overlapping region are defined. The display module is disposed on the touch sensing film.

Description

Touch display device and its electronic device

The present disclosure relates to a touch display device and an electronic device thereof.

In recent years, with the vigorous development of touch display device technology, touch display devices have been widely used in various electronic devices. Generally speaking, in an electronic device including a touch display device, in order to prevent the user from noticing the electrode lines in the peripheral area and affecting the visual perception, a light-shielding layer is used to cover the peripheral area, and a frame is arranged outside to cover the lines in the internal non-visible area. while protecting internal components.

In order to improve the visual experience, how to reduce the range or extension length of the electrode lines in the peripheral area without affecting the design and performance of the electrode lines, so as to promote the development of narrow borders and full screens, the existing technology needs to be improved.

An object of an embodiment of the present disclosure is to provide a touch display device, which includes a cover plate, a touch sensing film, a display module, a first adhesive layer, a second adhesive layer, and a third adhesive layer. The touch sensing film is arranged on the cover plate. The touch sensing film includes a first surface and a second surface opposite to the first surface, and a first direction is defined between opposite ends of the touch sensing film, and a direction passing through the first surface and the second surface is defined as The second direction, the second direction is perpendicular to the first direction. Opposite two ends of the touch sensing film are bent from outside to inside, so that the first surface or the second surface overlap each other, defining an overlapping area and a non-overlapping area. The display module is disposed on the touch sensing film. The first adhesive layer adheres the overlapping first surfaces in the overlapping area, wherein the thickness of the first adhesive layer is 50 microns to 100 microns. The second adhesive layer adheres the cover plate and the touch sensing film. The third adhesive layer bonds the touch sensing film and the display module, wherein the thickness of the third adhesive layer is greater than or equal to 2 times the thickness of the first adhesive layer and less than or equal to 5 times the thickness of the first adhesive layer.

In some implementations, the second adhesive layer adheres the light-shielding layer and the touch-sensing film.

In some embodiments, the distance between the first surface and the second surface in the non-overlapping area of the touch sensing film along the second direction defines a first thickness, the first thickness is T1, and the overlapping area The distance between the second surfaces along the second direction defines a second thickness, and the second thickness is T2. T1 is between 0.025 mm and 0.075 mm, and T2 is between 0.1 mm and 0.2 mm.

In some embodiments, a light-shielding layer is disposed between the cover plate and the touch sensing film, wherein the main part of the light-shielding layer is located in the overlapping area, and the length of the light-shielding layer along the first direction is greater than that of the overlapping area in the first direction. length so that the portion of the shading layer is located in the non-overlapping area.

In some embodiments, the length of the light-shielding layer in the first direction is L, and L is between 1 mm and 2.5 mm.

In some embodiments, the surface of the touch sensing film adjacent to the cover plate has only the second surface, and the surface of the touch sensing film adjacent to the display module has both a portion of the first surface and a portion of the second surface, the first The distance along the second direction between the portion of the surface and the portion of the second surface defines a height difference H1, and H1 is greater than zero.

In some embodiments, the surface of the touch sensing film adjacent to the display module has only the second surface, and the surface of the touch sensing film adjacent to the cover plate has both a portion of the first surface and a portion of the second surface, the first A distance along the second direction defines a height difference H2 between the part of the surface and the part of the second surface, and H2 is greater than zero.

In some implementations, the projection positions of the second adhesive layer and the first adhesive layer on the touch sensing film along the second direction do not overlap.

In some implementations, the second adhesive layer partially overlaps the projection position of the first adhesive layer on the touch sensing film along the second direction.

In some embodiments, the second adhesive layer is coated on the second surface of the touch sensing film overlapping with the cover plate.

In some embodiments, the light transmittance of the second adhesive layer and the third adhesive layer is at least 60%.

In some embodiments, the display module includes a light guide plate, wherein the light guide plate is disposed on the touch sensing film.

Another object of an embodiment of the disclosure is to provide an electronic device including the aforementioned touch display device.

It can be understood that different implementations or examples provided in the following content can implement different features of the subject matter of the present disclosure. The examples of specific components and arrangements are used to simplify the present disclosure and not to limit the present disclosure. Of course, these are examples only and are not intended to be limiting. For example, the description below that a first feature is formed on a second feature includes that the two are in direct contact, or that there are other additional features between the two instead of direct contact. In addition, the present disclosure may repeat reference numerals and/or symbols in several embodiments. Such repetition is for simplicity and clarity and does not imply a relationship between the various embodiments and/or configurations discussed.

The terms used in this specification generally have their ordinary meanings in the art and the context in which they are used. The examples used in this specification, including examples of any term discussed herein, are illustrative only and do not limit the scope and meaning of the disclosure or any exemplified term. Likewise, the disclosure is not limited to some of the embodiments provided in this specification.

In addition, relative terms in space, such as "below" and "upper", are used to conveniently describe the relative relationship between one element or feature and other elements or features in the drawings. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings. The device may be otherwise positioned (eg, rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In this article, "a" and "the" can generally refer to one or more, unless the article is specifically limited in the context. It will be further understood that the terms "comprising", "comprising", "having" and similar words used herein indicate the features, regions, integers, steps, operations, elements and/or components described therein, but do not exclude Other features, regions, integers, steps, operations, elements, components, and/or groups thereof.

It will be understood that, although the terms first, second etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present embodiments.

As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Several embodiments are listed below to describe the touch display device of the present invention in more detail, but they are only for illustrative purposes and are not intended to limit the present invention. Note that the scope of protection of the present invention shall prevail as defined in the scope of the attached patent application.

FIG. 1A to FIG. 1E exemplarily depict schematic diagrams of various process stages of manufacturing the touch display device 100 according to some embodiments of the present disclosure.

First, please refer to FIG. 1A , providing a touch sensing film 110 , a first adhesive layer 121 and a second adhesive layer 122 , wherein the touch sensing film 110 includes a first surface 111 and a second surface relative to the first surface 111 The surface 112, the direction passing through the first surface 111 and the second surface 112 is defined as a second direction (for example, the Z-axis direction in Figure 1A), and the second direction is perpendicular to the first direction (for example, in Figure 1A X-axis direction). The first adhesive layer 121 is disposed on the first surface 111 and adjacent to or located at a peripheral portion of the touch sensing film 110 , and the second adhesive layer 122 is disposed below the second surface 112 . In some embodiments, the first adhesive layer 121 is disposed on the first surface 111 and located at opposite ends 113 , 114 of the touch sensing film 110 . In some embodiments, the second adhesive layer 122 and the first adhesive layer 121 are between the opposite ends 113, 114 of the touch-sensing film 110 on the touch-sensing film 110 along the second direction (for example, FIG. 1A The projection positions in the Z axis direction) do not overlap. In some other embodiments, the second adhesive layer 122 and the first adhesive layer 121 partially overlap the projection position of the touch sensing film 110 along the Z axis. In one embodiment, the second adhesive layer 122 may also be coated on the second surface 112 of the touch sensing film 110 overlapping with the cover plate 130 .

In some embodiments, the touch sensing film 110 includes a plurality of electrode lines, and the electrode lines are flexible. In some embodiments, the flexible electrode wires can be formed of transparent conductive materials, including but not limited to: nano silver paste, nano silver mixture, nano silver polymer or a combination thereof. In some embodiments, the electrode lines can be obtained through a photolithography process.

In some embodiments, the distance between the first surface 111 and the second surface 112 of the touch sensing film 110 along the Z axis defines a first thickness T1. In some embodiments, the first thickness T1 is between 0.025 mm and 0.075 mm, such as 0.025 mm, 0.03 mm, 0.035 mm, 0.04 mm, 0.045 mm, 0.05 mm, 0.055 mm, 0.06 mm, 0.065 mm, 0.07 mm, 0.075 mm or any interval value in the aforementioned point value.

In some embodiments, the adhesive material of the first adhesive layer 121 can be light-transmissive (for example, a material with a light transmittance of at least 60%, for example, a light transmittance of 60%, 70%, 80%, 90%, or values in any interval of the aforementioned point values) or light-shielding (e.g. materials with a light transmittance of at most 20%, e.g. a light transmittance of 5%, 10%, 15%, 20%, or any interval of the aforementioned point values value). In one embodiment, the light-transmitting material of the first adhesive layer 121 may be optical clear adhesive (OCA), biaxially-oriented polyethylene terephthalate (BoPET, also known as Mylar) ^® ) or polyethylene terephthalate (PET) with OCA.

In some embodiments, the thickness of the first adhesive layer 121 is less than 150 microns, for example, between 10 microns and 150 microns. In one embodiment, the thickness of the first adhesive layer 121 is 10 microns, 20 microns, 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, 110 microns, 120 microns, 130 microns, 140 microns, 150 microns, or a value in any range of the aforementioned point values.

In some embodiments, the second adhesive layer 122 is a light-transmitting material. Those skilled in the art can flexibly select and adjust the material and thickness of the second adhesive layer 122 according to the purpose of use. Similar light-transmitting materials and thicknesses.

Please continue to see Figure 1B. Provide the cover plate 130 and the light-shielding layer 140 disposed on the cover plate 130; then, use the second adhesive layer 122 to bond the cover plate 130 and the touch sensing film 110, so that the second adhesive layer 122 and the light-shielding layer 140 are located on the cover plate 130 and the touch sensing film 110 . The area where the light-shielding layer 140 is projected on the cover plate 130 along the second direction (for example, the Z-axis direction) is the peripheral area PA, and the area of the cover plate 130 that is not covered by the light-shielding layer 140 is defined as the visible area VA (ie, The second adhesive layer 122 is filled here). It should be noted that, in this structure, the length of the touch sensing film 110 along the first direction (for example, the X-axis direction) is greater than the length of the cover plate 130 along the first direction. In some embodiments, both ends 113 , 114 of the touch sensing film 110 extend beyond the length of the cover plate 130 . In other embodiments, the second adhesive layer 122 can further extend to between the light-shielding layer 140 and the touch-sensing film 110 in addition to bonding the cover plate 130 and the touch-sensing film 110 to bond the light-shielding layer 140 and the touch-sensing film 110 . Sensing film 110 . That is, the second adhesive layer 122 is also disposed between the light-shielding layer 140 and the touch-sensing film 110. At this time, the second adhesive layer 122 can make the bonding between the light-shielding layer 140 and the touch-sensing film 110 stronger. The tightness also makes the interface between the second adhesive layer 122 and the touch sensing film 110 less likely to have air bubbles.

In some embodiments, the cover plate 130 can be made of a transparent substrate, such as a transparent inorganic substrate (such as a glass substrate) or a transparent organic substrate. The transparent organic substrate can be a plastic substrate, such as polymethylmethacrylate (poly(methylmethacrylate); PMMA), polyethylene (polyethylene; PE), polyvinyl chloride (polyvinyl Chloride; PVC), polypropylene (polypropylene; PP) ), polyethylene terephthalate (polyethylene terephthalate; PET), polyethylene naphthalate (polyethylene naphthalate; PEN), polycarbonate (polycarbonate; PC), polystyrene (polystyrene; PS) , polyimide (polyimide; PI), cyclo-olefin polymers (cyclo-olefin polymers; COP) and other transparent materials.

In some embodiments, the light-shielding layer 140 may be formed of opaque ink, such as black ink, white ink, and the like. In some embodiments, the length of the light-shielding layer 140 along the X-axis direction defines a length L, and the length L is between 1 mm and 2.5 mm, such as 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm or any value in the range of the aforementioned point values. In some other embodiments, the light-shielding portion may also be directly included in the cover plate 130 instead of the light-shielding layer 140 .

Next, please see Figure 1C and Figure 1D at the same time. Figure 1C and Figure 1D are schematic diagrams of different viewing angles in the same step, where Figure 1C is a top view (view in the X-axis and Y-axis directions), and Figure 1D It is a cross-sectional view (view in X-axis and Z-axis directions). For example, the opposite ends 113, 114 of the touch sensing film 110 are bent upward along the bending line BL from the outside to the inside, and the parts of the first surface 111 are superimposed on each other and bonded with the first adhesive layer 121, so as to An overlapping region OR and a non-overlapping region NOR are defined. In some embodiments, it is not limited to bending the opposite ends 113 , 114 , and any end of the touch sensing film 110 can be bent separately.

In some embodiments, the light-shielding layer 140 has two lengths L along the X-axis direction, and one of the lengths L is greater than the length of the overlapping region OR along the X-axis direction. Therefore, the main part of the light shielding layer 140 is located in the overlapping region OR, and part of the light shielding layer 140 is located in the non-overlapping region NOR. That is, the entire overlapping area OR will be located within the range of the peripheral area PA (please also refer to FIG. 1B ), which can close the overlapping area OR within the shielding range of the light-shielding layer 140 to prevent the overlapping area OR from affecting the visual effect.

In some embodiments, along the Z-axis direction, except for the lowermost part 1121 of the second surface 112 in the overlapping region OR, another part 1122 of the second surface 112 is folded to the uppermost. The distance between the uppermost second surface 112 (portion 1122 ) and the lowermost second surface 112 (portion 1121 ) along the Z-axis direction in the overlapping region OR defines the second thickness T2. In some embodiments, the second thickness T2 is between 0.1 mm and 0.2 mm, such as 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm or a value in any range of the aforementioned point values. The thickness obtained by subtracting twice the first thickness T1 from the second thickness T2 is the thickness of the first adhesive layer 121. The thickness of the first adhesive layer 121 can be greater than or equal to 50 microns and less than or equal to 100 microns, that is, 50 microns≦( T2-2T1)≦100 microns, such as 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, or any value within the aforementioned range. When the thickness of the first adhesive layer 121 is less than 50 microns, the bending degree of the touch sensing film 110 is too large (that is, the bending radius R is too small), and at this time, the conductive lines or electrode patterns in the bending area are likely to be broken. , resulting in poor touch control; when the thickness of the first adhesive layer 121 is greater than 100 microns, the third adhesive layer 123 (please refer to FIG. 1E ) needs to be thicker to effectively adhere to the touch sensing film 110 The overall thickness of the touch display device 100 is too large due to the display module 150 , which is contrary to the development trend of the touch display module towards thinner and thinner.

In addition, please refer to FIG. 1D. In some embodiments, in addition to bonding the cover plate 130 and the touch sensing film 110, the second adhesive layer 122 can further extend between the light shielding layer 140 and the touch sensing film 110. , to bond the light shielding layer 140 and the touch sensing film 110 . That is, the second adhesive layer 122 is also disposed between the light-shielding layer 140 and the touch-sensing film 110. At this time, the second adhesive layer 122 can make the bonding between the light-shielding layer 140 and the touch-sensing film 110 stronger. The tightness also makes the interface between the second adhesive layer 122 and the touch sensing film 110 less likely to have air bubbles.

Next, see Figure 1E. The third adhesive layer 123 and the display module 150 are provided; then, the third adhesive layer 123 is used to bond the touch sensing film 110 and the display module 150 to obtain the touch display device 100 . In the touch display device 100, the surface of the touch sensing film 110 adjacent to the cover plate 130 only has the second surface 112, and the surface of the touch sensing film 110 adjacent to the display module 150 also has a part 1112 of the first surface 111 and The other part 1122 of the second surface 112, the distance between the part 1112 of the first surface 111 and the other part 1122 of the second surface 112 along the Z axis defines a height difference H1 (that is, the thickness of T2 minus T1, Please also refer to Figure 1D). That is, if the third adhesive layer 123 fills the gap between the touch sensing film 110 and the display module 150, the third adhesive layer 123 coated on the non-overlapping region NOR, the distance along the Z-axis direction Define the thickness T4. The distance along the Z-axis direction of the third adhesive layer 123 coated on the overlapping region OR defines a thickness T3. Wherein, the thickness T4 is greater than the thickness T3. In some embodiments, the thickness T4 of the third adhesive layer 123 is greater than or equal to 2 times the thickness of the first adhesive layer 121 and less than or equal to 5 times the thickness of the first adhesive layer 121, that is, 2 (thickness T2-2 times Thickness T1)≦T4≦5(T2-2T1). If the thickness T4 is less than this range, it is not enough to tightly bond the display module 150 and the touch sensing film 110 in the presence of the height difference H1; Between the three adhesive layers 123 , or between the display module 150 and the part 1122 , air bubbles are likely to appear and cause moisture to invade the touch sensing film 110 and cause touch failure. If the thickness T4 is greater than this range, the overall thickness of the touch display device 100 will be too large, which is contrary to the development trend of the touch display module towards thinner and thinner.

In some embodiments, the third adhesive layer 123 is a light-transmitting material so as not to affect the visual appearance of the viewing area VA. Those skilled in the art can flexibly select and adjust the material and thickness of the third adhesive layer 123 according to the purpose of use, for example, the same or similar light-transmitting material and thickness as the second adhesive layer 122 .

It should be emphasized that, in some embodiments of the present disclosure, the design of bending the touch sensing film 110 can reduce the length of the touch sensing film 110 in the peripheral area PA without affecting the design of the electrode lines. . Accordingly, the design of the touch display device with a narrow frame or even a frameless frame is realized. In addition, using the bent design to fold part of the touch sensing film 110 inside the touch display device 100 can also prevent the outer electrode lines of the touch sensing film 110 from being exposed, and provide a more perfect solution for the touch sensing film 110. protection, prolonging the service life of the touch display device 100 .

In some implementations, the display module 150 may include a light guide plate disposed on the touch sensing film 110 . In other embodiments, the display module 150 can be replaced by a backlight module, such as an organic light-emitting diode (Organic Light-Emitting Diode, OLED).

In other implementation aspects, those skilled in the art can flexibly exchange, delete, or add other elements or steps according to actual needs.

For example, please refer to FIG. 2A to FIG. 2D , which are schematic cross-sectional views of various process stages of manufacturing the touch display device 200 according to some embodiments of the present disclosure.

Figures 2A to 2D can use the same or similar materials and parameter characteristics as those in Figures 1A to 1E, wherein the touch sensing film 210 can correspond to the touch sensing film 110, and the first adhesive layer 221 can correspond to the second An adhesive layer 121, the second adhesive layer 222 may correspond to the second adhesive layer 122, the third adhesive layer 223 may correspond to the third adhesive layer 123, the cover plate 230 corresponds to the cover plate 130, the light-shielding layer 240 corresponds to the light-shielding layer 140, and The display module 250 corresponds to the display module 150 .

The difference between Fig. 2A to Fig. 2D and Fig. 1A to Fig. 1E is that, in Fig. And the inside is bent upwards, so that the first adhesive layer 221 adheres the overlapping portion of the first surface 211 to define the overlapping region OR in the touch sensing film 210 . Next, in FIGS. 2B to 2C , the second adhesive layer 222 is used to adhere the bent second surface 212 of the touch sensing film 210 to the cover plate 230 .

In FIG. 2C to FIG. 2D, the same steps as those in FIG. 1D to FIG. 1E are adopted, and the third adhesive layer 223 is used to bond the display module 250 and the touch sensing film 210 to obtain a touch display device. 100 is the same as the touch display device 200 . As shown in Figures 2C and 2D, in some embodiments, the second adhesive layer 222 can further extend between the light shielding layer 240 and the touch sensing film 210 in addition to bonding the cover plate 230 and the touch sensing film 210 , To bond the light-shielding layer 240 and the touch sensing film 210 . That is, the second adhesive layer 222 is also disposed between the light-shielding layer 240 and the touch-sensing film 210. At this time, the second adhesive layer 222 can make the adhesion between the light-shielding layer 240 and the touch-sensing film 210 stronger. The tightness also makes the interface between the second adhesive layer 222 and the touch sensing film 210 less likely to have air bubbles.

In the embodiment shown in FIG. 2C to FIG. 2D, the thickness of the first adhesive layer 221 (that is, the thickness defined with reference to T2-2T1 in FIG. 1D) and the thickness of the third adhesive layer 223 (that is, the thickness T4), There is also the following relational formula: the thickness of the first adhesive layer 221 is greater than or equal to 50 microns and less than or equal to 100 microns, such as 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns or any value in the aforementioned range; In addition, the thickness T4 is greater than or equal to 2 times the thickness of the first adhesive layer 221 and less than or equal to 5 times the thickness of the first adhesive layer 221 . The reason for setting the thickness ranges of the first adhesive layer 221 and the third adhesive layer 223 is the same as that described above in FIG. 1D and FIG. 1E (thickness relationship between the first adhesive layer 121 and the third adhesive layer 123 ).

FIG. 3 illustrates another aspect of the present disclosure, exemplarily depicting a schematic cross-sectional view of a touch display device 300 according to other implementations of the present disclosure. The difference between FIG. 3 and FIG. 1E and FIG. 2D is that, in the touch sensing film 310 , the folded portion 3122 of the second surface 312 is adjacent to the light shielding layer 340 .

The touch display device 300 in FIG. 3 can use the same or similar materials and parameter characteristics as those in FIG. 1A to FIG. 1E, and achieve the same or similar effects, wherein the touch sensing film 310 can correspond to the The measuring film 110, the first adhesive layer 321 can correspond to the first adhesive layer 121, the second adhesive layer 322 can correspond to the second adhesive layer 122, the third adhesive layer 323 can correspond to the third adhesive layer 123, and the cover plate 330 can correspond to the cover plate 130 , the light shielding layer 340 corresponds to the light shielding layer 140 , and the display module 350 corresponds to the display module 150 .

The method of manufacturing the touch display device 300 is roughly the same as that of the touch display devices 100 and 200, the difference is that the second surface 312 of the touch sensing film 310 is bent from the outside to the inside from the opposite sides so that the first adhesive Layer 321 adheres overlapping portions of first surface 311 . Then, the bonded touch sensing film 310 is turned upside down, and the second adhesive layer 322 is used respectively to bond the folded part 3122 of the second surface 312 and the light-shielding layer 340, as well as to bond the cover plate 330 and the first surface. The non-overlapping portion of 311. The third adhesive layer 323 is also used to bond the unfolded portion 3121 of the second surface 312 of the touch sensing film 310 with the display module 350 to obtain the touch display device 300 as shown in FIG. 3 .

In the touch display device 300, the touch sensing film 310 is bent from the outside to the inside from opposite ends, so that the first surfaces 311 overlap each other, and along the Z-axis direction, the second surface 312 in the overlapping region OR except Apart from the lowermost part 3121 , another part 3122 of the second surface 312 is folded to the uppermost and bonded with the second adhesive layer 322 to define an overlapping region OR and a non-overlapping region NOR. The surface of the touch display device 300 adjacent to the display module 350 only has the second surface 312, and the surface of the touch sensing film 310 adjacent to the cover plate 330 includes a part 3112 of the first surface 311 and another part of the second surface 312. 3122 , the distance along the Z axis between the part 3112 of the first surface 311 and another part 3122 of the second surface 312 defines a height difference H2 (ie T3 - T4 ). That is, the second adhesive layer 322 fills the gap between the touch sensing film 310, the light-shielding layer 340 and the cover plate 330, and the second adhesive layer 322 coated under the non-overlapping region NOR has a distance along the Z-axis The defined thickness T6 is greater than the defined thickness T5 of the second adhesive layer 322 coated on the overlapping region OR along the Z axis.

In the embodiment shown in FIG. 3, the thickness of the first adhesive layer 321 and the thickness of the second adhesive layer 322 (i.e. thickness T6) also have the following relationship: the thickness of the first adhesive layer 321 is greater than or equal to 50 microns, And less than or equal to 100 microns, such as 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns or any value in the aforementioned range; in addition, the thickness T6 is greater than or equal to twice the thickness of the first adhesive layer 321 and less than equal to 5 times the thickness of the first adhesive layer 321 . The reason for setting the thickness range of the first adhesive layer 321 and the second adhesive layer 322 is the same as that described above in Figures 2C to 2D (thickness relationship between the first adhesive layer 221 and the third adhesive layer 223), and Figures 1D to 1E ( The thickness relationship between the first adhesive layer 121 and the third adhesive layer 123 is the same.

In some embodiments, the touch display device provided in this disclosure can be further assembled with other electronic components to form an electronic device, including but not limited to mobile devices (mobile phones, tablet computers, or notebook computers), wearable devices (smart watches, smart glasses, smart clothes, or smart shoes), and automotive devices (dashboards, dash cams, rearview mirrors, windows, doors).

To sum up, the touch display device provided by some embodiments of the present disclosure uses the outside-in folding of the touch-sensing film to reduce the length of the peripheral area, thereby reducing the frame of the touch display device, so as to realize a frameless or is a narrow border. In addition, the folding design of the touch sensing film can also store the electrode wires inside the device at the same time, which can prevent the electrode wires from being exposed to the outside, thereby protecting the electrode wires, improving the durability of the touch display device, and extending the service life.

While this disclosure has described details in terms of certain implementations, other implementations are possible. Therefore, the spirit and scope of the appended claims should not be limited to the implementations described herein.

100, 200, 300: touch display device 110, 210, 310: touch sensing film 111, 211, 311: the first surface 112, 212, 312: the second surface 113, 114: terminal 121, 221, 321: the first adhesive layer 122, 222, 322: the second adhesive layer 123, 223, 323: the third adhesive layer 130, 230, 330: cover plate 140, 240, 340: shading layer 150, 250, 350: display module 1112, 1121, 1122, 3112, 3121, 3122: part L: Length T1, T2, T3, T4, T5, T6: Thickness H1, H2: height difference BL: bend line VA: Visual Area PA: Peripheral Area X: X-axis Y: Y-axis Z: Z-axis

A more complete understanding of the present disclosure can be obtained by reading the following detailed description of the embodiments with reference to the accompanying drawings. FIG. 1A to FIG. 1E exemplarily describe schematic diagrams of various process stages of manufacturing a touch display device according to some embodiments of the present disclosure; FIG. 2A to FIG. 2D exemplarily describe cross-sectional schematic diagrams of various process stages of manufacturing a touch display device according to other embodiments of the present disclosure; and FIG. 3 exemplarily depicts a schematic cross-sectional view of a touch display device according to other embodiments of the present disclosure.

100: Touch display device

110: Touch sensing film

111: first surface

112: second surface

121: The first adhesive layer

122: Second adhesive layer

123: The third adhesive layer

130: cover plate

140: shading layer

150: display module

1112, 1122: part

L: Length

T3, T4: Thickness

H1: height difference

VA: Visual Area

PA: Peripheral Area

X: X-axis

Z: Z-axis

Claims (13)

A touch display device, comprising: a cover plate; a touch sensing film disposed on the cover plate, wherein the touch sensing film includes a first surface and a second surface opposite to the first surface A first direction is defined between opposite ends of the touch sensing film, a second direction is defined as a direction passing through the first surface and the second surface, and the second direction is perpendicular to the first direction , wherein opposite ends of the touch sensing film are bent from outside to inside, so that the first surface or the second surface overlap each other, defining an overlapping area and a non-overlapping area; a display module, set on the touch sensing film; a first adhesive layer adhered to the overlapping first surfaces in the overlapping area, wherein the thickness of the first adhesive layer is 50 microns to 100 microns; a second adhesive layer is adhered The cover plate and the touch sensing film; and a third adhesive layer bonding the touch sensing film and the display module, wherein the thickness of the third adhesive layer is greater than or equal to twice the thickness of the first adhesive layer , and less than or equal to 5 times the thickness of the first adhesive layer. The touch display device according to claim 1, wherein the second adhesive layer adheres a light shielding layer and the touch sensing film. The touch display device according to claim 1, wherein the distance between the first surface and the second surface in the non-overlapping area of the touch sensing film along the second direction is defined as A first thickness, the first thickness is T1, and the distance between the second surfaces along the second direction in the overlapping region defines a second thickness, the second thickness is T2, wherein T1 is between 0.025 mm and 0.075 mm, and T2 is between 0.1 mm and 0.2 mm. The touch display device according to claim 3, wherein a light-shielding layer is disposed between the cover plate and the touch-sensing film, wherein the main part of the light-shielding layer is located in the overlapping area, and the light-shielding layer is along the first The length in the direction is greater than the length of the overlapping area in the first direction, so that the part of the light-shielding layer is located in the non-overlapping area. The touch display device according to claim 4, wherein the length of the light-shielding layer in the first direction is L, and L is between 1 mm and 2.5 mm. The touch display device according to claim 1, wherein the surface of the touch sensing film adjacent to the cover plate only has the second surface, and the surface of the touch sensing film adjacent to the display module also has the second surface A portion of a surface and a portion of the second surface, wherein the distance between the portion of the first surface and the portion of the second surface along the second direction defines a height difference H1, H1 greater than 0. The touch display device according to claim 1, wherein the surface of the touch sensing film adjacent to the display module only has the second surface, and the surface of the touch sensing film adjacent to the cover plate also has the second surface A part of a surface and a part of the second surface, the distance between the part of the first surface and the part of the second surface along the second direction defines a height difference H2, H2 is greater than 0 . The touch display device according to claim 1, wherein the projection positions of the second adhesive layer and the first adhesive layer on the touch sensing film along the second direction do not overlap. The touch display device according to claim 1, wherein the second adhesive layer partially overlaps the projection position of the first adhesive layer on the touch sensing film along the second direction. The touch display device according to claim 1, wherein the second adhesive layer is coated on the second surface of the touch sensing film overlapping with the cover plate. The touch display device according to claim 1, wherein the light transmittance of the second adhesive layer and the third adhesive layer is at least 60%. The touch display device as claimed in claim 1, wherein the display module includes a light guide plate, wherein the light guide plate is disposed on the touch sensing film. An electronic device, comprising the touch display device as described in claim 1.

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